feat: improve sveltekit example app with protected and admin routes

[vishnuchandrappan]

☕️ Reasoning

Not a bug. More of an improvement to the sveltekit example with proper reference to authentication and authorisation.

🧢 Checklist

• [x] Documentation (sort of)
• [ ] Tests (not applicable)
• [x] Ready to be merged

🎫 Affected issues

📌 Resources

• Security guidelines
• Contributing guidelines
• Code of conduct
• Contributing to Open Source

⚠️ Notes

• I have seen that the live example https://sveltekit-auth-example.vercel.app/ and the code I just edited are not similar.

[vercel[bot]]

The latest updates on your projects. Learn more about Vercel for Git ↗︎

Name	Status	Preview	Comments	Updated (UTC)
auth-docs	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Nov 27, 2024 11:58am

1 Skipped Deployment

Name	Status	Preview	Comments	Updated (UTC)
next-auth-docs	⬜️ Ignored (Inspect)	Visit Preview		Nov 27, 2024 11:58am

[vercel[bot]]

@vishnuchandrappan is attempting to deploy a commit to the authjs Team on Vercel.

A member of the Team first needs to authorize it.

[ndom91]

@vishnuchandrappan thanks for this update!

As you noticed, the deployed example is not the code yuo've edited. For context, we usually have 2 apps for each client/framework in this monorepo.

1. The ones under apps/dev/*, like the one you edited, are designed to be used for local development only. They're the ones that should be started with the root npm script dev:sveltekit (for example).
2. The other app you linked, is located under apps/examples/* and these are designed only to be synced to their respective demo repos and then deployed via Vercel as legit demos for folks to play around with. i.e. the apps/examples/sveltekit app is synced to nextauthjs/sveltekit-auth-example (see this file for sync details)

As a sidenote, there's another PR in flight updating the sveltekit demo app (apps/examples/sveltekit/*) here: #12287

[stale[bot]]

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